Ventilatory predictions of metabolic rate are more precise than heart-rate predictions, though the latter can be improved with specific adjustments for thermal state and exercise mode.
May favor ventilatory over heart-rate predictions for metabolic rate accuracy; leaves open validation of adjusted models in occupational settings.
Ventilatory predictions were more precise, but errors from heart-rate predictions could be minimized by using thermal-state and exercise mode-specific predictions.
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Notley et al. (2014) studied this question.
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